Field



(No Model.)

J-. C. BUTTERFIELD & T. U. BATCHELOR. CARTRIDGE CASE.

No. 430,918. Patented June 24, 1890.

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a fi fi L (UNITED STATES PATENT OFFICE.-

JOHN COPE BUTTERFIELD AND TELFORD CLARENCE BATCHELOR, OF LONDON, ENGLAND.

CARTRIDGE-CASE.

SPECIFICATION forming part of Letters Patent No. 430,918, dated June 24, 1890. Application filed January 3,1890. Serial No. 335,7'79- (No model.) Patented in England August 22, 1889, No. 15,160.

To aZZ whom it may concern.-

Be it known that we, JOHN COPE BUTTER- FIELD and TELFORD CLARENCE BATCHELOR, subjects of the Queen of England, residing at London, in England, have invented certain new and useful Improvements in Damp-Proof Cartridges-Cases, (for which we have applied for Letters Patent of GreatBritain No. 15,160, dated August 22, 1889,) of which the following is a specification.

This invention relates to damp-proof oartridge-cases such as when charged may be used for mining purposes, and which may be constructed of metal-such as lead, lead and antimony, or lead and tin-but which may be of vulcanite or some such material.

In the accompanying drawings, Figures 1 and 2 are central longitudinal sections of alternative forms of cartridge-cases constructed according to this invention.

Like letters of reference indicate like parts in both figures of the drawings.

A is the main inclosing portion, which, to-

gcther with the closed end A, preferably made in part with it, is herein termed the shell of the cartridge, and B is the cap which closes the other end of it. In Fig. 1 this cap B is represented as slightly domed, and is formed with an excrescence B, the thickness of the material of which and the other parts of the cartridge cases being practically uniform throughout. lhe cap B may either be of the form shown in the accompanying drawings or it may be in the form of ahollow or solid plug to fit inside the open end of the shell A. WVhen filling the before-described cartridgecase, the explosive is introduced through the then open end of the shell A, and the cap B is afterward placed over the said end, a tight joint being made between'the parts A and B by means of soldering, screwing, resin, paint, or other suitable means. The cartridge thus prepared is fit for use even at a remote date, as it is thoroughly impervious to moisture.

Instead of forming the excrescence on the cap B in the manner-before described, the cap may be plain and the excrescence formed on the closed end A, which may also be slightly domed, as shown in Fig. 2. In other respects the cartridge-case shown in Fig. 2 is substantially of similar constructionto that shown in Fig. 1.

\Vhen the detonator is to be inserted into either of the before-described cases, a knife is passed around thecylindrical portion B of the excrescence B and the closed end of it removed, and into the hole thus produced the detonator is inserted.

Although the before-described cases by the shade -lines are represented of cylindrical form, they may, if desired, be of other form, and the excrescences, instead of being central, may be eccentric, and may be upon the ends or other part of the case, and, if desired, the said cases may be formed each of three partsa central or body portion and two caps, one on each end thereof; but this is not so desirable a form as one of less parts, as there are more joints to renderwater-tight.

WVe claim- 1. A cartridge-case having a closed excrescenceformed integral therewith, substantially as described.

2. A cartridge-case havinga cap connected thereto, the cap having a closed excrescence formed integral therewith, substantially as described.

In testimony whereof we have hereto set our hands in the presence of the two subscribing witnesses.

JOHN COPE BUTTERFIELD. TELFORD CLARENCE BATCHELOR.

Witnesses:

0. Boss,

323 High Holborn, W C. T. LUKE,

28 Southampton Buildings, W O. 

